After a simple research, I discover that stock can generally offer more stable returns compare to crypto. thou crypto offer higher gain.
How about you invest in both and not choose one over the other, stocks has their benefits, Bitcoin also has its benefit. I said Bitcoin instead of crypto because investing in Bitcoin and still choosing to invest in altcoins isn't diversification but my advice is for you to diversify into Bitcoin and stock. Stock can pay you dividends but that isn't possible with Bitcoin and those dividends can be used as cashflow to help you when you're in need of money as the crypto market isn't always stable to give you profit regularly.
Do I need to choose stock over crypto?
I don't want my attention to be divided.
You don't, if you must choose then it has to be Bitcoin over stock. Investing in both Bitcoin and stock won't divide your attention. Being an investor that wish to gain financial freedom, you should have different investment to build your portfolio to be strong just incase one market isn't favourable at a particular time that you need fiats, you can switch your attention to other of your investments. Stock and Bitcoin are two different types of investment with different types of research and you can add more investments like Forex etc.