I see this a little differently. If you have the ability and financial capacity, then I think diversifying your investments is a positive way . Because having multiple income sources means having strong financial security. Because even if your primary income source suddenly stops, you can still get financial support from other investments. Investing in Bitcoin is a long-term process. If you invest here, you must think about getting profit after a long time. But there are some investments where cash flow comes from them a few days after the investment, you can diversify into such investments. But if you do not have the financial capacity, then there is no need to diversify into different investments and face additional risk and mental stress.
Everyone is free to chose his path which he think can give him best return over period of time because its your money and in the end only owner of money will bear consequences. If you are thinking to invest in different sectors then you have to wait their also to see good return because their are not many frontiers in the world which can make you rich overnight.
I only focus on Bitcoin because I have got knowledge of how to invest in Bitcoin and that I got this knowledge after spending years in Bitcoin. You won't learn everything through video lectures and tutorials but by actually investing in Bitcoin and spending time learning it.
