Well the worst btc decision that i have done was not listening to my family member and i was least interested to use btc and i never showed any kind of interest towards btc those days btc was so cheap as compared to as of now and they were lot of ways to get free btc in a day and mining btc was also so easy anybody could do mining at the comfort of their own home personal computer and i felt that it was something stupid to stick on with btc that is the worst decision that i have ever made relating to btc.