I can say bitcoin is both property and a currency its because if you choose to hold it well you can calld it as your property that will grow someday, and also if you choose to pay it for deals,goods,pays or anything transactions you want is can be called also a currency thats why i can say its both since bitcoins is flexible and can be used in different aspects if we want to, just used it wisely.
It means that bitcoin like cash is also liquid. You can transfer into cash, or buy nything you want. That is the advantage of bitcoin, and also through ime it also appreciates in value. Property also apprecciates in value, but in time of financial emergeny its hard to turn it into cash. You can pawn or well it for a lower price for fast transaction.