What does it take to make crypto tokens 1:1 with stock/fx markets.

Imagine I could swap ETH (or even erc20 tokens like DEGEN) for $COIN (coinbase stock) or swap $AAPL for USDC.

From my thinking, I needs a whole lot of capital to back the stocks, also carries some risk for volatile stocks but similar to crypto exchanges, stock back crypto can be listed and unlisted at anytime.

I would use this
product. It would really reduce the friction of working with brokers and switching funds between crypto and stock markets