UPDATE
I made 100% profit in a day. Whatever I'm not gonna touch 'em. If BCN appreciates to only a coupla cents in coming years, the investment will have a very big ROI.
Original Post
I was fascinated by the price arbitrage opportunity (simultaneous purchase and sale of an asset to profit from a difference in the price) of Bytecoin (BCN) in exchanges and wished to make a 30% profit in a matter of minutes. Anyone can spot the opportunity:

Source: https://coinmarketcap.com/currencies/bytecoin-bcn/#markets
I hastily bought some BCN at 58 Satoshi per BCN, but I cannot sell it for intended 90 Satoshi or so. Deposits and withdrawals disabled in alcurEX and Poloniex. I wanted to look up what happened with Bytecoin and was shocked especially by this bitcointalk thread posted in 2014. Senior folks in the cryptocurrency world may already be suspicious of BCN. Devs don't use their real identity, their reddit subredit is filled with sockpuppets.
Steemit search returns only posts in favor of BCN; a post by @stephen-somers, though, talks about a critical bug found in CryptoNote upon which BCN, XMR, XDN and a few other tokens are based. Monero team patched the bug, but no news from BCN team.
I'm waiting for my wallet to download the blockchain; then I can sell my BCN. I'm a newbie in crypto and still not sure whether to release the coins. Or am I better off holding them? Suggestions would be much appreciated.