As we speak, Bitcoin (CRYPTO: BTC) has a market cap of $1.6 trillion, making it the largest cryptocurrency and likewise one of the largest belongings on this planet. That may not be the case inside 5 years: Ethereum (CRYPTO: ETH), Solana (CRYPTO: SOL), or Zcash (CRYPTO: ZEC) might be value extra. However as of Nov. 4, none of these cash had been value even 20% of it.
Closing a market cap hole that enormous will take some severe issues for Bitcoin and likewise a number of essential victories for the contenders. Right here is one situation to contemplate.
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Bitcoin’s quantum drawback might be a serious drag, and prior to anticipated
Theoretically, a strong sufficient quantum computer might crack Bitcoin’s encryption and allow the theft of customers’ funds. No such laptop exists at present. Nevertheless, in March 2026, Google’s Quantum AI division estimated that breaking Bitcoin can be considerably simpler than beforehand believed, and it wasn’t the primary to counsel this.
Crypto consultants consider that over 34% of all Bitcoin might be susceptible to this sort of assault, and the coin’s worth would take severe punishment if a quantum assault had been ever confirmed. That punishment would additionally hit the establishments holding it by way of spot Bitcoin exchange-traded funds (ETFs).
There are a number of plans to patch Bitcoin’s blockchain to protect in opposition to quantum threat, however they’re nonetheless in draft type and are extremely controversial among the many Bitcoin developer group. The authors of one such plan, referred to as BIP-361, say that implementing it could take 5 years, and even beginning that course of would require quite a bit of consensus constructing that’s solely getting began.
In distinction, Bitcoin’s challengers have clearer timelines for mitigating the quantum risk, although none of their plans are completed but, both.
The Ethereum Basis is planning to have core quantum protections in place by about 2029. Solana’s builders selected a quantum-resistant signature scheme in April 2026, an essential precursor to immunizing their blockchain, although they nonetheless haven’t any plans to make near-term adjustments. On the entrance of the pack are Zcash’s builders, who goal to begin defending some transactions from quantum assaults by January 2027.
So the fundamental circumstances for a situation through which one of these cash surpasses Bitcoin’s worth within the subsequent 5 years are that quantum computing continues to turn into extra subtle in phrases of the accessible {hardware}, the accessible quantum code-breaking algorithms, and the attainable assault routes. Consequently of both a quantum computing breakthrough or an precise quantum assault on Bitcoin, the market might flee the cryptocurrencies which are considered insecure and as a substitute pile into no matter secure havens exist.
