Yes some altcoins are. But most are not recommend to invest in. Do research on your own to find good investments.
I would recommend NEM and Ethereum.
There is a lot of alternative coins, but my opinion so far if planning to invest alt coin better choose among these 3 such as, ETH,Ripple or Monero. I think those 3 altcoins has big chances to get strong in the market few years from now. Those are the most widely used coin aside from bitcoin.