Any bets on BTC?

[David Rabahy]

The Bitcoin becomes like rare art scenario worries me; will the miners abandon us in search of higher rewards from a digital currency that scales better?  How many transactions per period are required to make it worth their while?  If they do jump then does Bitcoin become vulnerable to a 51% attack?  Do the holders of rare art Bitcoins have to pay a fee for parking value for long periods of time without transacting to sustain their security?