Be careful with young, not checked exchanges! Seems like some HEAT exchange want to list XEL. Just be careful. Do not lose your XEL/BTC. I'm not saying that HEAT asset exchange is bad or scam. I just don't know this exchange and I would rather be sceptic about it.
This is true.
Better to sell/buy OTC via escrow at the moment, to secure your position, and wait for more serious/founded exchanges, than taking unnecessary risks with small/unknown/questionable exchanges. This will prevent needless loss of funds.