Yes, not only when investing in Bitcoin requires financial stability but also in all investments, what makes a person most unsuccessful in investing in Bitcoin is because they will expect success in short term, even though investment is long term, and often when someone who doesn't have a stable income will be very possible to sell his crypto assets regardless of whether the conditions are positive or negative to meet urgent needs.
This is the mostly the type of scenario when an investor is not financially stable this not only happen in bitcoin investment but also in any form of investments. The possibility to sell their crypto because of the contingency to meet their need is highly probable. There we could distinguish clearly what's the difference between an investors with a financial stability to an investor without a financial stability. Rich investor has a high probability to keep their investment in a long term because they don't have the urgent to meet that they must ended up selling their asset that made in invesment.