Bitcoin investment is profitable if you hold it for a long time. Investing in bitcoin can secure your future, so you can't really make regular profit from bitcoin investments.
So you need other sources of income to generate regular income or bitcoin. There are so many opportunities where you can make bitcoin.
Technically, it's true but if you're relying on it alone by hodling on it then it's not profitable per se because you're not creating a constant profit although you are expecting a profit nonetheless. Totally that you need another source of income, with the current world economy, it's really in anyone's best interest that they have a multiple streams of income.