Basically it all boiled down to which would appreciate better: BK or BTC.
That's no different than any other ICO or altcoin. What is different though, is that BetKing has an actual working product already.
The buyback also prevents BKB to bubble up in price like most altcoins do. You can't pump something that has a fixed price somewhere else.
I could be wrong on this, but basically the BKB tokens could suddenly look like a great investment
if the BTC price would drop sharply?
It's kind of a hedge against a price drop. I trust BKB more than I trust Tether.