There are already many ways to buy and sell crypto without a bank account and without KYC. For example, you could buy/sell via cash in person, cash by mail or gift cards with a peer-to-peer exchange such as HodlHodl.com, Agoradesk.com or Bisq, or use a Bitcoin ATM from CoinATMRadar.com. Alternatively, you could buy/sell electronics, gold or silver for crypto. You could also earn crypto with Microlancer.io or FreelanceForCoins.com. There are more KYC-free exchanges at KYCnot.me and BitcoinBookmarks.com. In the future with more adoption, it should be possible to pay for groceries, apartment rent, healthcare, public transit, subscriptions and other daily life necessities directly with crypto, and avoid the state's surveilled and exclusionary fiat system entirely.