PUT the word Bitcoin into Google and you get (in Britain, at least) four adverts at the top of the list: “Trade Bitcoin with no fees”, “Fastest Way to Buy Bitcoin”, “Where to Buy Bitcoins” and “Looking to Invest in Bitcoins”. Travelling to work on the tube this week, your blogger saw an ad offering readers the chance to “Trade Cryptos with Confidence”. A lunchtime BBC news report visited a conference where the excitement about Bitcoins (and blockchain) was palpable. All this indicates that Bitcoin has reached a new phase. The stockmarket has been trading at high valuations, based on the long-term average of profits, for some time. But there is nothing like the same excitement about shares as there was in the dotcom bubble of 1999-2000. That excitement has shifted to the world of cryptocurrencies like Bitcoin and Ethereum. A recent column focused on the rise of initial coin offerings ......