I consider the strategy of investing in the best coins to be very interesting. Therefore, if the market gets a bull, the price of the best coins can multiply multiple times. I am sorry that your colleagues are leaving the market. Since this also leads to a fall in cryptocurrency.
All this is a very relative concept, because in most cases it turns out that people leave but return very quickly, because today it makes sense to talk about it. Since today, all the same, there are wonderful situations in which it would really listen to people who already have experience after such actions of Bitcoin. Everything in our world is cyclical.