if we talk about the next 5 years. I don't think it's 99%, but all crypto including bitcoin. the reason is when bitcoin has reached the total supply, people will think crypto is no longer profitable.
Stupidities. Your forecast is based on the assumption but you forget that during these 5 years, cryptocurrencies will develop, change and adapt to the requirements of time. In addition, nothing prevents to earn now and not to think about what will happen in 5 years. Just follow the development of cryptocurrencies (BTC, ETH, XMR) over the past 5 years. If in 2013 only a few people knew about them, now almost every housewife has heard about cryptocurrencies.