As per the current market situation, many good coins are falling due to dot, cake and many other reasons. I would suggest buy cake, sol, and such coins for at least 5k amount, and soon those coins will return high profit margin
I think we absolutely will have high profit if we have already invest to SOL in July, because the price increased 600% in the mid of this month. And I still believe that SOL will give us much profit in the future. Also i wanna suggest to invest to ETH, I think it is a good time because eth price has correction and we will get more profit when the price is up again.
But if you will going to invest in SOL now then you might only get 2 things.
-- will earn in the future
-- Will lose in the future.
In my personal opinion, the best altcoin to invest in long-term is Ethereum (ETH), because you can see that the price of ETH itself is very stable, I believe ETH can reach $5000+ in the near future
But Cardano is making hard for Ethereum to reach its Momentum .