Hello again....since i want to know what is bitcoin for you...and what you think about anothers cryptocurrencies like ethereum,litecoin,dogecoin,eth classic,zcash,dashcoin,monero,golem and others...
I think they still exist but of having profitable, I don't think so. Because they have been in the market for a long time and a lot of altcoins newly created and this would affects its potentiality. But I believe ETH is still having a huge chances to compete others.