Looks like he is trying to refer memebers towards his betting services like the telegram name suggest. Or he is one of the guy who got lucky on their bet and won the jackpot but dont know how to cashout those winning.

If bitcoin is legal in your country than make a quick google search, you will find some local exchanges and you can sell it without getting into trouble. If its illegal to trade bitcoin than exchange it for perfectmoney like unregulated payment processor and find people who are willing to buy PM for local fiat.