And please recommend now next potencial altcoin to buy?
BNB is a very popular altcoin at this time, because BNB has many projects, that is
1. Exchange
2. Launchpad/Launchpool
3. Blockchain
so of course BNB could be a worthy choice for investment, but I also recommend you to investing in Ripple, because I believe that when the bullrun occurs, then the price of Ripple will increase to reach its ATH price or create a new ATH price.