What are the similarities between Bitcoin and Gold?

That they are both non financial, liquid monetary units that reside outside of the Financial system and enjoy not having exposure to financial or sovereign counterparty risk. Gold is tangibe and btc is not, but it may be wise to own both if you want a deep out of the money option that does not expire. I run a Gold Bullion Hedge Fund and obviously own and manage gold bullion. Personally I support the ownership of crypto currencies.