I'm sure no one will know for sure which coins can go up by 50x. in my opinion you should do your own research don't trust anyone. because the crypto market is decentralized there is no control so that no one in the future will be like crypto. we can only predict. there are some good altcoins like XRP, litecoin and EOS I think the three coins have the opportunity to grow rapidly. and also keep investing in bitcoin because it is the best coin in crypto. Bitcoin once reached the highest price of $ 20,000 and now costs $ 3800. This is a good opportunity to buy and we are waiting for Bitcoin to reach even more