When you have done your research and are now a better informed investor, it’s time to buy the cryptocurrency you want to invest into. This might be a bumpy road, depending on what you want to invest into, because not all coins are listed on all exchanges. Each project will usually have a page explaining where the cryptocurrency can be exchanged. You can buy cryptocurrency either via instant-access exchanges or full exchanges. Each have their pros & cons:
Preferred stocks are very different from shares of common stock most investors own. Holders of preferred stock are always the first to receive dividends, and in cases of bankruptcy, will be first to get paid. However, the stock price does not fluctuate the way common stock does, so some gains can be missed on companies with hypergrowth. Preferred shareholders also get no voting rights in company elections. They're a hybrid of common stock and bonds.
Stock exchanges operate as for-profit institutes and charge a fee for their services. The primary source of income for these stock exchanges are the revenues from the transaction fees that are charged for each trade carried out on its platform. Additionally, exchanges earn revenue from the listing fee charged to companies during the IPO process and other follow-on offerings.

Diversification allows you to recover from the loss of your total investment (20% of your portfolio) by gains of 10% in the two best companies (25% x 40%) and 4% in the remaining two companies (10% x 40%). Even though your overall portfolio value dropped by 6% (20% loss minus 14% gain), it is considerably better than having been invested solely in company E.
Most Wall Street pundits will tell you it's impossible to time the stock market. While it's unrealistic to think you'll get in at the very bottom and out at the very top of a market cycle, there are ways to spot major changes in market trends as they emerge. And by spotting those changes, you can position yourself to capture solid profits in a new market uptrend and keep the bulk of those gains when the market eventually enters a downturn.
A word on exchange balances: it is NOT RECOMMENDED to keep your cryptocurrency assets on exchanges. There are countless documented cases of people who lost access to their funds, either because their account was disabled, or because legislation forbade the exchange operator to give access to users based on their geographical location. Some exchanges have been hacked in the past and will be hacked. It is RECOMMENDED that you use your own wallets, that you secure them properly (more below) and that you limit the cryptocurrency held in exchanges only to carry the business/transactions you have to, and for the most limited amount of time, to reduce exposure.

It depends. 24/7 support is essential to some investors, while others may be completely fine using online chat during regular market hours or receiving an email back within one business day. That said, most investors neglect to think about a market crisis like a flash crash. In our experience, it certainly doesn't hurt to have reliable customer service available for whenever the need may arise.
Risk tolerance is also affected by one’s perception of the risk. For example, flying in an airplane or riding in a car would have been perceived as very risky in the early 1900s, but less so today as flight and automobile travel are common occurrences. Conversely, most people today would feel that riding a horse might be dangerous with a good chance of falling or being bucked off because few people are around horses.
While some people do buy winning tickets or a common stock that quadruples or more in a year, it is extremely unlikely, since relying upon luck is an investment strategy that only the foolish or most desperate would choose to follow. In our quest for success, we often overlook the most powerful tools available to us: time and the magic of compounding interest. Investing regularly, avoiding unnecessary financial risk, and letting your money work for you over a period of years and decades is a certain way to amass significant assets.
What would make me sell: Sometimes there are good reasons to split up. For this part of your journal, compose an investing prenup that spells out what would drive you to sell the stock. We’re not talking about stock price movement, especially not short term, but fundamental changes to the business that affect its ability to grow over the long term. Some examples: The company loses a major customer, the CEO’s successor starts taking the business in a different direction, a major viable competitor emerges, or your investing thesis doesn’t pan out after a reasonable period of time.