Gift cards and p2p exchange for fiat using a dex or another service. As long as there is money to be made, the Indian crypto black market will thrive and grow.
Bitcoin allows any Indian with a cellphone to easily exploit global arbitrage opportunities (BTC/INR and */INR to /) , bypass capital controls, and save money in a medium that the Indian government cannot debase. At least a few million people (especially the international traveler class) will find these characteristics extremely valuable whatever the status of local regulation.
Forgive me for being skeptical, but I’ve never seen Bitcoin used as a medium of exchange. You could argue it’s a store of value, but that’s also contentious. In the last year, it’s back to its original price. So much for being an inflation hedge.