I think it will kill BTC.

not everyone knows about BTC while everyone is at facebook and google.
if they will create their own cryptocurrency. Everyone will be into it. Other investments that are meant to be invested in BTC will be invested in their crypto instead because of the fact that everyone knows it. it is more accessible and widespread unlike BTC today.

Not really. As a pioneer in cryptocurrencies, Bitcoin will only increase in value once companies like Facebook and Google acknowledges the use of Cryptocurrencies. Although I'm not sure why Facebook suddenly banks ICO's relating to cryptocurrency but I think it has to do with SCAM, one thing is for sure It has affected the Bitcoin and other cryptocurrencies in the market. Anyway Bitcoin it self is shrouded with mystery as Satoshi, the founder of Bitcoin so to say, has gone missing for ages. One thing is for sure due to the limited number of Bitcoin and the increase in awareness of Bitcoin, people will go and try it at one point creating more demand that increases the price of Bitcoin and other cryptocurrencies in general. As for Facebook and Google creating their own, its not far fetched, we can only wait and see. If you are in this forum you know that its not the case. The more we ban something, the more people look for it. I don't know if their is something wrong with us people but its just the way things work out. I'm following this thread for any news on Facebookc Coin or Google Coin.