I made a similar mistake when investing in the altcoin 'Mooncoin'. For weeks I had been trading it against bitcoin and had been on occasion placing a trade and waking up another £250 richer... then one week I was away on a training course for my work and didn't have regular internet access. I had around £3000 in Mooncoin at the start of the week, one morning it dropped around £200, I didn't mind as experience had shown that it would rebound - that's how I had been making such huge gains so no big deal... it went up a little as the week progressed... then down a little... and then a little more... and then...

By the time I got home from my training course my £3000 holdings had become £75 :(

Mooncoin never significantly recovered.

I stayed well away from cryptocurrency for several months after.