Regarding exchange listings - as I've mentioned several times before, Justin Sun owns Poloniex and is in bed with CZ from Binance. I'm sure you've seen the multiple Tron, Wink, BTT etc promos run their before. If Justin Sun wishes to execute a hostile takeover, and Steemit.com, Poloniex and Binance supports it, who do you think other exchanges will support? I still hope Justin takes the high road and comes to an amicable agreement with Steem witnesses. Either way, it certainly is a risk high enough to justify considering hedging your investments, or at the very least power down to keep it in liquid form. Be safe, all the best.