As for the title, I think one should consider they financial capability when investing in Bitcoin. They should make sure that they have more than enough money to sustain their needs while holding Bitcoin so that they won't be in a situation where they have to sell their holdings at a loss due to emergency needs.
There are a lot of things that need to be considered before we invest in bitcoin and listing all those factors I think would be very long. I agree with you, in investing, profit and risk are the things we all care about first, so it can be said that considering our financial capability is what we need to pay attention to the most and most importantly.
Bitcoin is a very volatile investment, it can generate huge profits but can also make us lose, so only invest with idle money, that is something we should consider and consider. As long as we have not solved the problem of capital for investment, do not rush to consider other factors because capital is the most important thing when it comes to investment.