Bit coin is not exactly classified as cash, but I think it is a store of value; so in this case when deviating from bitcoin it's like making an expense, even when buying paper money it is like making a direct purchase in my world view.. the same as when I buy sugar for tea. Same as when spend bitcoin for paper monies.
So like this can be objective where putting "investment" in crypto atm is practically nothing except btc.
As the economy expands there will be other stores of value that's for sure, especially as they experience utility: for example eth will be useful for contracts because some business will offer an exclusive service depending on ether; true story.. look at slock.it - so dao is a company essentially that manages products such as "slock it"
^^ above is just an analysis of an existing dynamic on the horizon of what could establish yet another cash like crypto asset.