The only solution Kroll sees is to rewrite the rules of the currency. It would need some kind of governance structure that agreed to have a kind of tax on transactions or not to limit the number of bitcoins created, he says. We expect both mechanisms to come into play.
Bitcoin is going to come under increasing pressure to create an inflationary system. The powers-that-be cannot stand non-inflationary currencies (gold, silver, bitcoin, etc) as they promote social mobility and help prevent massive wealth redistribution upwards. I hope BTC doesn't crack.
I also thought the discussion about hashrate magnitude to be a moot point as well.. Bitcoin ( PMC as well ) will adjust to make block times 10 minutes... when it is not profitable to mine, the miners will mine somethin else... the only real issue is to have enough total hashrate to avoid a 51 percent double spend situation with PMC... there are no block rewards to 'selfish mine' really. This could be accomplished by have every future wallet to a very small amount of hash rate automagically.... like a single cpu thread at half speed... when the wallet is active... and have enough like minded people to donate some hashrate at the network when an anomaly is detected... Otherwise we don't need billions of billions of billions of hashes to maintain a network.... POS solves this now actually...