I am sure that some people use their pension funds to jump into bitcoin and they use all of the money to buy bitcoin. But I would say that it's not a good idea and I will call that is greediness because we don't know what will bitcoin do in the future. Bitcoin price itself will still fluctuate from time to time, and we cannot expect to see bitcoin can increase higher in one night, and that is impossible.
I will suggest to that person to use 50% of the total of his pension funds to invest in crypto. 30% to invest in bitcoin, and 20% in the altcoin but he needs to know how to pick the right altcoin, so he doesn't pick the wrong coins for the investment. I am sure that he can found the best coin and he can be able to make a big profit for a long-term investment.
Positive or negative idea? It much depends on every people. If I were in such a situation like that, i mean that im old enough to get pension, definitely I would invest in cryptocurrency but just a portion of it, yep 50% of the pension is okay. Inherently at that time I probably have knowledge, experience, ability and that sort of thing to invest in crypto. The most important things that I get concerned is my health, if its good, yep definitely I will. When one is getting older, he tends to find something interesting to focus, and with me maybe I will use my pension to invest in crypto, and maybe this will lead my life better and get rid of boring anyway.