Bitcoin has far superior: portability, divisibility, speed of final settlement, absolute scarcity, and verifiability. Any financial product that needs these attributes to function will interact with bitcoin on some layer to gain better function. Think of Strike (Jack Maller's company) , he is running basically a Western Union on the bitcoin block chain. Most of his payments are fiat, but bitcoin allows faster speeds, lower costs, and less fraud.
Bitcoin at the end of the day will be baked into everything, and since bitcoin's value comes from it's network effect, each new participant adds exponential value to bitcoin (see Metcafe's Law).
