My biggest regret is not buying bitcoins earlier and losing all my btc in gambling. But now I know and have researched about it I think I won't have any regrets again.
PS. I don't recommend gambling, you'll end losing. But you can if you have skills.
Since I had never made gambling big loss ( more than 0.06btc ) but still beside the gambling I made many mistakes that are .
first mistake that I made in the Bitcoin was to investment in the btc generator site and they were promised that they will double my Bitcoin if I will deposit atleast 0.01btc that was much coastly for me at that time .
And second mistake was for the investment in the mining site but the site ran away with big scam in the Bitcoin market and that results into the loss of 40$( approximate ) .
And my third mistake was to sell my altcoin at very low rate and next day it became magically 1000 times more , I am telling about Putin .
So here currently I have just stopped my investment in hyip sites and not making even the deposit of 0.001btc , because I don't want loss my money more for the Ponzi scheme .
Trading and signature campaign are best for earning purpose .