Hi, nice post, thanks for sharing. I think people have built wallets into telegram before as appealing as it sounds none have really taken off.
Great if Telegram are having a go for real themself this time around but there is still a TON of unswered questions, not least it sounds too good to be true and I posted about that, here..https://steemit.com/eos/@johnchamberlain/telegram-open-netork-ton-an-elaborate-hoax
Should also add that Techcrunch also wrote about messaging app Line considering its own cryptocurrency.