Bitcoin and Altcoin investment both are very profitable. All kind of Altcoin depends on Bitcoin. If Bitcoin price goes dump so Altcoin will go dump. If Bitcoin price goes high so Altcoin price will go high. That's why if you have to make the huge profit so you can buy Bitcoin and hold it for a very long time. And you can trade with Altcoin. You can make much profit from Altcoin trading. Also, you can hold some potential Altcoin for a very long time. I always prefer to hold. If you can hold any potential token so obviously you will able to make a huge profit