It is not enough for cryptocurrency wallet to support 3-4 basic cryptocurrencies. It is necessary to have a lot of users.
Why not? If many people use at least one coin in a certain wallet, this may be enough to create a large turnover and profit from commissions. At the same time, there may be 1000 coins in the wallet, but if no one uses this wallet, then there will be no profit.
This is a true statement. But why wouldnt I make a wallet in which there will be all the necessary coins and a good turnover!