Bitcoin has many of the attributes of gold as a store of value.
People want to hold Bitcoin for the same reasons they want to hold gold. While gold has been relatively flat, the recent increase in the value of bitcoin is attracting more investors.
It is interesting to me to see die-hard gold bugs poo-poo bitcoin.

One thing that is attractive is that the supply of BTC is known and fixed. It does not change no matter how high the price rises.
In the case of other commodities, the higher the price, the more supply. This is because it becomes economic to "mine" marginal sources as the price increases.