The two main types of IRAs are Roth and Traditional, and the difference between them has to do with when you pay taxes. With a Roth IRA, you contribute money after taxes, so your withdrawals are tax-free in retirement. In most cases, contributions to a Traditional IRA are tax deductible, but you'll pay taxes when you withdraw money in retirement.
C (Fair) - In the trade-off between performance and risk, the stock has a track record which is about average. It is neither significantly better nor significantly worse than most other stocks. With some funds in this category, the total return may be better than average, but this can be misleading since the higher return was achieved with higher than average risk. With other funds, the risk may be lower than average, but the returns are also lower. In short, based on recent history, there is no particular advantage to investing in this fund.
Finally, one point to mention is that a given cryptocurrency can be listed in more exchanges, with different listing prices (see below – Arbitraging). The best place to look for a cryptocurrency listing in term of total market capitalisation is Coinmarketcap. Cryptocurrencies are listed per descending order of market capitalisation; the site also allows to deep-dive on each cryptocurrency to see their value over time and where they are listed. Some cryptocurrencies may be listed on several exchanges but only 1 or 2 exchanges may see the critical mass of transactions taking place.