Poderia isso representar uma ameaça as criptos???

Currently there are no real ways or ideas where a QC can break through the SHA256 function and find out a public key but OTOH a future QC can break a public key cryptography and reveal the private key. The QC pose a threat for PKC type of algorithms but they cannot break the hash functions and if they come nearer to them, we can certainly double up the bit sizes. QC require around 1500 qubits to crack the ECDSA algorithm and the current working IBM Q System One has only 20 quantum bit. So it might take around 10-20 years for a quantum computer to reach at least 1000 quantum bits.But at least our bitcoin developers would find a way to adopt Bitcoin with Post-Quantum Cryptography techniques.