https://github.com/cryptoquick/bips/blob/e1fa27cb25deee8d58bdb9a64c112dfdf09e216d/bip-p2qrh.mediawiki

Quote

Abstract
This document proposes a new SegWit output type, with spending rules based on SQIsign signatures. (For more on why SQIsign is chosen, see the Security section.) A constraint is that no hard fork or modifications leading to an increase in block size are necessary.

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Security
Quaternion isogeny signature algorithms represent the state of the art in post-quantum cryptography, beyond lattice cryptography, especially when key and signature length are major constraints.

Quantum resistant signature algorithms ordered by shortest proposed signature size:

SPHINCS+ - 17KB
pqNTRUsign - 702 bytes
FALCON - 666 bytes
HAWK - 652 bytes
SQIsign - 177-335 bytes
SQIsign2D-West - 148-294 bytes
SQIsignHD - 109 bytes

SQIsign, quantum resistance algorithm, is coming.

don't worry about the price, we'll see 70K in serveral months.