Here's a thought experiment: imagine how much you would pay, in Pounds Stirling, for your vote in a General Election... a local election... on an issue you care about using Interactive Democracy. £1, £10, £1000? Compare this value to how much money you would consider keeping in an online bank account. This gives some sort of comparison of the value and security of Interactive Democracy.
According to this research 44% of adults are expected to use an online bank account by 2012.