both are going to make you profit, and altcoins are more for you to get more bitcoins, but there is something here that you need to understand, many altcoins have no use in real life, however you see the price being low because all people are saying that the price of altcoins X is low. you have to be very careful because this altcoin can have a low price every day. I'll give you examples of some cases. see the case of LISK, STRATS and VERGE. they had very high prices and a great community and high expectations, but today all this is gone, because investors are disappointed with empty promises


 Altcoins are the champions in this area