Before investing in bitcoin, all of the guiding principles should be taken into account. As you mentioned, the first is financial stability. The second is knowledge, which will prevent you from being taken advantage of during the introduction process. The third is to take security seriously and know how to activate good security measures. Returning to financial stability, you stated that if you don't have other sources of income, you will use your investment as a repository for an emergency fund, which is bad for business. and since investing in bitcoin is a long time business patience is another factor to be considered.
All the principles, financial stability, security measures, and knowledge are good factors to consider;
What about the risk involved?
In my own understanding, I think risk taking is also an important factor to be considered before embarking on a bitcoin investment process because of the techniques behind it, and the market instability.