It is worth it but you could earn more or control the risk by spreading your investment not just focusing on single one remember "don't put all your eggs in one basket".
But it would also depends on your skill if you could earn more if you only focus on single trade then stick with it rather than just picking random alr coin to trade and make up your portfolio.
But at the same time, if you kept all your eggs in a Bitcoin basket, then you would probably be retired now.
It really depends on what you want, and how much risk tolerance you have.
Bitcoin has been proven to be a very good performer over the years.