It is already possible. For example, investing $200K stable coin (e.g. USDC or, DAI) for 3 month fixed deposit in Crypto.com can earn 12% in Stable which is paid weekly. Once the $2000 per month profit is deposited to Debit Card account. With that VISA debit card anything can be purchased from the anywhere in the world.
RE: All in crypto? Are stable tokens secure enough for our life savings?