I don't think it can be a source of main income unless you're trained in daytrading and TA. And with that, even TA experts say that crypto doesn't follow TA.

That said, I think daytrading crypto is gambling.

Bitcoin can't be a main source of income, because you're either hodling or selling for profit that one time. It's more like an investment that realizes.

I would not be a good financial advisor if I told people to make bitcoin their main income. They need a steady stream of income daily to make ends meet -- and you can't force the crypto market to give you that. On some days you're forced to hodl, and on other days you're forced to sell (if you know without a doubt that things will go down).