First, there are definitely more differences than similarities because the two are more different than similar. Similarities would include limited supply, although on the part of gold it is naturally formed beneath layers of soil. It is limited but the earth could generate more of it after thousands of years. Bitcoin is also limited. But even this similarity is not really total. Bitcoin's supply is not just limited, it is fixed. Gold's supply is not fixed.

Another similarity is that both new supply of gold or new Bitcoins are acquired through a process called mining. But then, again, this similarity is also limited. Bitcoin mining is too far different from gold mining.

Value is something both gold and Bitcoin has. They are similar on that respect as well. However, the value of gold is doubtless intrinsic. It could be said that its value has been there since time immemorial. Bitcoin's value is different in the sense that Bitcoin is virtual and therefore it is something intangible. It cannot be made into something we may use daily. As a matter of fact, its value is still being debated until now.