It can work as a day-to-day currency, but it compromises the decentralization that is key to Bitcoin's usefulness as a store of value:
+ By allowing 8x larger blocks (unless it's even larger now?), if in widespread use with full blocks, the blockchain would be 8x larger. Bitcoin's blockchain is already the better part of 1TB, though you can still fit that on a cheap SSD. Imagine if it were 8 and growing fast.
+ Because BCH uses the same hash algo as Bitcoin, but is much less popular, it's at risk of 51% attack.
+ Because there is no pressure on block sizes, fees are very low, which means that as halvings continue the block rewards for BCH will get extremely small. This will result in hashrate continuing to decrease, putting it at even greater risk of 51% attacks. Bitcoin's high fees allow it to remain profitable for miners even without inflation. Miners have to be paid to keep the network secure, and that's either going to come from tx fees or from inflation. BCH aims to have neither and that puts it at risk.
And anyway, there are much better solutions for day to day payments, such as Monero and Ethereum.
> By allowing 8x larger blocks (unless it's even larger now?), if in widespread use with full blocks, the blockchain would be 8x larger. Bitcoin's blockchain is already the better part of 1TB, though you can still fit that on a cheap SSD. Imagine if it were 8 and growing fast.
This has always felt like a completely weaksauce argument to me. Even with Bitcoin, very few people other than dedicated miners download a full blockchain (like it or not). 1TB is already too large to keep on your phone or laptop, but 8TB is at most a minor inconvenience on a server or dedicated mining rig. What's the demographic where a measly factor of 8 makes a difference?
> very few people other than dedicated miners download a full blockchain
I'm gonna have to ask for evidence on this one, I strongly believe most full nodes are not mining pools. http://bitdash.io/ says there are ~10,000 running full nodes, yet there are only ~100 mining pools that have produced a block in recent history: https://miningpoolstats.stream/bitcoin
> 1TB is already too large to keep on your phone or laptop
On your phone, sure. But my desktop already has a few TB of storage. But not 8. And Bitcoin Cash supporters usually seem to indicate that they'd increase it beyond 8 if the 8mb blocks filled up.
Every Bitcoin Cash transaction is on the chain itself. Bitcoin is increasingly reliant on off-chain "Lightning" transactions. An extra few TB of data or majority of transactions not on the chain at all? I'll go with more data & transparency, thank you.
+ By allowing 8x larger blocks (unless it's even larger now?), if in widespread use with full blocks, the blockchain would be 8x larger. Bitcoin's blockchain is already the better part of 1TB, though you can still fit that on a cheap SSD. Imagine if it were 8 and growing fast.
+ Because BCH uses the same hash algo as Bitcoin, but is much less popular, it's at risk of 51% attack.
+ Because there is no pressure on block sizes, fees are very low, which means that as halvings continue the block rewards for BCH will get extremely small. This will result in hashrate continuing to decrease, putting it at even greater risk of 51% attacks. Bitcoin's high fees allow it to remain profitable for miners even without inflation. Miners have to be paid to keep the network secure, and that's either going to come from tx fees or from inflation. BCH aims to have neither and that puts it at risk.
And anyway, there are much better solutions for day to day payments, such as Monero and Ethereum.