Everything that has a fixed quantity will always increase in price (assuming the Fed continues inflating the currency 1-5% /yr)

Land, collectibles, natural resources, Bitcoin: as long as they are priced in USD and USD is constantly devalued year after year - prices will rise.

A fixed quantity only means that the supply is inelastic, it doesn't —by any stretch of the imagination— mean that the price will always increase. The only thing that is guaranteed to increase in price, assuming a positive rate of inflation, is a large basket of goods and services. Anything else is a gamble.

a) There's a limited supply of bitcoins b) The amount of bitcoin you get decreases as more are made c) The larger the network the more it costs to make a bitcoin d) Some bitcoin are deleted forever, accidentally.

So a) Bitcoins become harder to make, and b) The total possible number of Bitcoins goes down.