Because altcoins have great future and great technology inside in it. Also the other thing you have big chance to earn good amount of money with investing altcoins. Why people want to invest real estate or stocks. Waiting 2 3 years for only 2x . That is funny. Altcoin market is really volatie you can loss or earn but at least you have to chance to do that. and you will be succesful if you will work hard.