I really hate bitgrail.com,even make me think xrb(nano) not good as well.And it not pump to good price,I just sold all xrb and get btc back,
close account ,got out of that shit market site.dont wanna buy xrb again.thanks god.
see some realy bad news in this morning，check out:
https://www.reddit.com/r/BitGrailExchange/comments/7wh2ox/finally_the_truth_17000000_xrb_stolen_from/

Official NANO statement:
https://medium.com/@nanocurrency/official-statement-regrading-bitgrail-insolvency-ed4422bf274b

glad I'm escape from that trap.