Could this be a way to prevent house price speculation?

Could there ever be a way to dampen the market and prevent housing being used as a speculative asset?

What about law from this point forward which established that new homeowners retain an absolute, non-waivable right to their home, meaning no lender can enforce a claim against it except in the single case of the original mortgage used to purchase that property. While other agreements – such as equity release or using the home as collateral for additional loans – could technically be signed, they would be inherently unenforceable because the homeowner could always assert their ultimate right to the property and block foreclosure. In effect, it would creates a system where a home can only function as collateral for its own purchase, eliminating its use as a general financial asset while preserving a single, enforceable mortgage tied directly to ownership.