When bitcoin mania was high, I noticed people are busy with piddly amount in zebpay, unocoin etc and happy with itsy bitsy profits. I ignored initially. But suddenly I realised the price of crypto coin in US, UK is cheaper than India. As crypto is decentralised, I use to buy coins in US and UK exchanges in $ or € based on Forex value against ₹ and sell them back in Indian exchanges. But I don't have any foreign bank accounts so I used credit cards to buy the coins in foreign exchnages like cex.io and sell in koinex etc Indian exchanges. I used get reward points also which would lower conversion charges and thus increasing profits. Rinse and repeat. I use to buy Ripple, Etherium as I get large quantity compared to bitcoin.
One day Central FM in parliamentary budget announced dealing with crypto is illegal. So I stopped there. Eventually crypto lost its shine and almost all Indian exchanges are shut down now.
I enjoy finance and investments. I'm a licensed insurance advisor and NISM certified mutual fund distributor. I feel funny when I think about those crypto episodes now.