Stupid, stupid, stupid. Great way to grow your money though. But it is stupid, stupid, stupid. Don't try be a hero invest some of it and what you can afford to lose and are okay with mentally and physically.
I initially did at the beginning of my journey in trading or investing. But yeah its a stupid mistakes because if bitcoin goes down, you will suffer a lost. That's why I learn to diversity.
Now I have a good portfolio in altcoins, specially when altcoin surges in the last couple of months. Although I have bitcoins in my wallet, I will not touch it in the next 6 months. I will used the gains that I got from altcoin to re-invest and recycle all my capital.