I laugh when I read the comments around the web about 'it's a scam', 'it's a sham', 'it's a ponzi scheme' and so on.
'It's guaranteed to fail" and blah blah.
These are primarily people who have not spent the time to study this. However, supposing they are right, look at it from a punter's perspective. It an ingenious, low-cost method of transfer that is faster, more cost effective and pseud-anonymous. You don't need to stay in bitcoins. You just complete your transfers and you're already profiting. Moreover, even if there's a dip in price during the transfer it is usually less than another withdrawal method. And sometimes it will work the other way and you'll profit by positive fluctuations. You will earn money by making a withdrawal. These benefits cannot be denied.
The next point I'd like to make is that if you're certain it will fail, then put your money where your mouth is. So many people who have spent less than one hour studying it will shout 'ponzi', 'scam' and so on, and they are convinced it will fail. Well, if it will fail, then this is the perfect opportunity, the likes of which you'll rarely ever see. Put $100,000 in it right now and fade it, watching it go from $221.80 down to $10.00. You just made a million dollars!
I am studying it and continue to study it. I don't think I've ever recommended to sit and hold.