Ive said it about 100x but I will say it again: if the concept of cryptocurrencies is truly revolutionary and here to stay, there almost certainly must be competing currencies in the space. If only for safety if nothing else. I do like the idea of PPC but I think it is too flawed to really succeed in its current state. But I welcome all the new ideas it is bringing forward that the oligarchal bitcoin core will not discuss properly as their system is just the best.
In particular, bitcoin cannot be relied upon as the
sole representative of crypto alone due to one potentially catastrophic design fault: satoshi chose the wrong hashing algorithm- SHA, when with hindsight it should have been something like scrypt right from the beginning.
This opens it up to a serious attack vector due to future technological advances. For example, if BFL or one of the other guys does indeed make a working ASIC then this opens up the 51% attack. Now I don't care about your usual poor 'it wouldn't be in their interests to 51% btc blah blah blah'. The weakness exists. Period.
What if someone were to break into their factory and steal all the chips then 51% the network? Sounds tinfoil now for sure as bitcoin is so insignificant. But what about in 5 or 10 years time if its a real threat to governments and banks etc? Due to the 'weak' algo at its heart we could have yet another exponential generation of ASIC-2 possible in 10 years time and the whole project could be killed in one move. Having several competing currencies ensures overall resiliency of the idea. Even if an asic could be built in the future to attack LTC it is unlikely that a malicious agent could build/aquire the means to attack all of LTC, BTC and PPC etc all at once.
In addition, we have the powerful argument that a set of competing cryptos would be better for the overall future of all involved, included btc. Competition between dev teams to further the technology or embrace new ideas will be very beneficial as compared to a slow and ponderous, unmotivated bitcoin only team due to no competition.
This is a refutation of the point of view that 'bitcoin is all that is needed, everything else is superflous'. If it had used a harder algo from the start then perhaps that would be almost true...