A beginner might prefer to trade cryptocurrency stocks on the stock market (GBTC is a trust that owns Bitcoin and sells shares of it; trading this avoids you having to trade cryptocurrency directly). The main Bitcoin stock here in 2018 is GBTC. Be aware that GBTC trades at a premium (meaning bitcoins are cheaper than buying shares of the GBTC trust), which isn’t ideal. Also, cryptocurrency trading is a 24-hour market, where the traditional stock market is not. Learn more about the GBTC Bitcoin Trust and the related pros and cons before you invest.
For myself, and most crypto traders, the goal is to increase the amount of Bitcoin we own. I don’t care about the US dollar, at least not directly. When I look at the price of a cryptocurrency, I look at it in terms of BTC. For example, right now the price of 1 ETH (Ethereum) is 0.049 BTC. My trades are based on that price, not the fact that 1 ETH is $304.
Never put all your eggs in one basket. Diversify. While the potential to earn more is increased with the amount of money you invest into a coin, the potential to lose more is also magnified. Another way to think about it is to look at the cryptocurrency market as a whole; if you believe that this is just the beginning, then more than likely the entire market cap of cryptocurrencies will increase. What are the chances that this market cap increase will be entirely driven by one coin vs. being driven by many coins? The best way to safely capture the overall growth of cryptocurrency is to diversify and reap the benefits of growth from multiple coins. Also, fun fact — Between January 2016 and January 2018, Corgicoin has increased by 60,000x, and Verge has increased by 13,000x. During the same period, Bitcoin has increased by 34x. While you would have gotten impressive gains from Bitcoin, expanding into other coins could have landed you potentially larger ones.