I mean, age is indeed a factor when investing in general. If you're closer to death then risking money onto a volatile asset such as bitcoin might not make that much sense. On the other hand? 28? Lol. OP has a pretty long runway unless he/she isn't taking care of him/herself.
then the investment will turn into an inheritance for their family, and it will be sustainable, there will be a continuation of the investment made as long as the owner takes care of everything. Everyone is even close to death, regardless of young and old.
Concerning self-care, of course, is an effort to better maintain the body to stay in normal condition and hope for a healthier life. (death will come anytime, ready or not ready it will come)