I understand that HN hates cryptocurrencies for all the right (moral, environmental, ponzi etc) reasons but OP asked for a high risk, short (5 years is short) investment that yields. Crypto is that. So answering the question with; crypto is very high risk, can disappear any moment, is bad for the environment, has no fundamentals etc etc However, the past 10 years show it is pretty good for high yields in short periods. Is better than just downvoting everyone who mentions it to hell imho.