Regarding widely held: Cryptocurrency is unknown to the majority as far as I can gauge. If someone has heard of it they might only know Bitcoin . Certainly haven't heard of Ethereum, Litecoin, Dash etc. The only people I know that are also invested are fellow technology people who understand the blockchain concept and have experience of wallets / exchanges etc. SO we are relatively early. When the taxi driver tells you to go in you know its time to sell (near the top)!