I believe that we can develop our hobby in parallel with our main job and quit work only when we have managed to develop our hobby well enough. Bitcoin is a good investment, but it will be meaningless if we do not have the funds to buy Bitcoin.
The same thing to running a business without enough capital to sustain. Because investment doesn't give us instant return we can fully rely on it, maybe months after. That is how important to have a least another source of income to back it up while waiting for our business or investment to grow. We can just quit working on other people if we are really ready and when our investment/business can already support our living. In order to have a good living, we also have to make multiple sources of income which is somewhat hard for poor people and I feel how hard it was.
You cannot invest in business if you do not have enough capital. Investing in cryptocurrency is the same, you need a certain amount of money to buy cryptocurrency. However, it is important to consider investing in cryptocurrency and maintaining your lifestyle.
If you do not have a steady source of income, then you should not invest all your money in cryptocurrency. Cryptocurrency is a highly volatile asset whose value can change very quickly. If you invest all your money in cryptocurrency and its value drops, you could lose all of it.