Bitcoin are more worth than Altcoin. it's has been proven with BTC price few days ago. Also it's more stable than Altcoin. I will not prohibit you to buy Alt, you have to choose by yourself, which is better.
But it provides less chance for him to get the decent profit. But people are still hyping the bitcoin ETF and i should consider the september as the finish line of the ETF hype. if that gets rejected and then you will know about the future of that.