Bitcoin is the best investment currency. It has withstood various suppression tests and has been around for the longest time. Bitcoin's perfect technology has been recognized by many people and can profit from it, and it is relatively safe.  Recently, various altcoins have continued to appear, and some people have made a lot of profits, but not all altcoins can bring benefits. Before investing in altcoins, you must first research them to reduce the risk of loss. You can choose to diversify your investment and invest money in multiple currencies to reduce the instability of future returns.