Yeap. It's a practice extensive enough for many apps to cover the market while being economically viable: Binance, Belo, Lemon, Buenbit, Takenos, etc. Which says much since we have a relatively small population of 46 million within which the practice is still a niche. Most people can't save yet, the ones that can accumulate something usually need to spend it soon after, for which case there are dozens of fine apps that offer interest rates that roughly match inflation. And by far most people who can buy dollars will get it physically in the black market. This says a lot about how much the market can expand still.