looks like you want to make a long-term investment, my advice is don't use all your money in 1 coin, but your choice is in your hands, SUI sounds quite promising and has potential, especially since it already has its own large enough community
But sometimes people don't want to think too much about the coin they invest so they prefer Bitcoin and only Bitcoin in their mind. so it's best to invest in what you like and believe that it will increase in price.