That's nice and all , however I suppose that BitcoinXT was the only project planning to increase the Blocksize of bitcoin (altcoin) .. now without what are we supposed to do with bigger blocks ? are Bitcoin Core developpers planning to do anything , if not there is no reason to continue using Bitcoin I suppose .. no mainstream = no future .

Where did you get the idea that Bitcoin needed to be adopted by mainstream to be successful in the first place?
I got it from being logic honestly , if Bitcoin was used by couple of people how in the world it will gain any value and become successful ? , it won't . we need more demand and with the "less supply of block halving price is supposed to go UP and that's it , there is other factors but I think the value is the most important thing on this situation and without a value it will simply die .
Your logic is wrong.
Read my post above.
Bitcoin is not a social network. As strange as it may sound its value does not come from more users.