nothing working when it comes to trading - except a nice website doing nothing

If I knew the low, I would have sold and bought back. If you don't know how low it's going to go, you shouldn't sell. So since you can't know, you shouldn't sell. Unless you don't understand Bitcoin. Oh shit, most don't.
As long as you end up with more BTC than you had at the top, you win.
true story - but what if you lost many btc inbetween?
