Quantum computing continues to pose a threat to Bitcoin (BTC) and altcoins, and measures need to be taken in this regard. Although there is no consensus on this issue, the latest report came from StarkWare, a crypto infrastructure company. StarkWare analysts presented, they say, the first practical technology to protect Bitcoin from quantum attacks without making any changes to the network. Thus, StarkWare proposed the creation of a quantum-secure Bitcoin (Quantum Secure Bitcoin, QSB), which would enable transactions resistant to quantum attacks without modifying the Bitcoin network. In this new proposal, it is claimed that Bitcoin transactions can be made resistant to quantum effects without the need for a soft fork. However, due to high costs and a complex user interface, its implementation may be limited; the proposal states that it should be used as a "last resort." Since the cost of each transaction is estimated to be between $75 and $200, this approach is considered commercially unfeasible.