Bitcoin is a store of value, it can converted from one currency to another without losing any value. Their are other physical form in which people can consider to be a better way to store their assets, but getting it done it can take expenses that will make the asset lose value. The potential to make good gain out of an asset without losing its initial value proves the worth of the asset and this is exactly what bitcoin is as a good store of value .
That's true, most of the Bitcoin users invest in Bitcoin only to get prosperous life because of that investment and there is nothing wrong in such mentality as we all know that many people have earned fortunes when they have invested in Bitcoin in its early days. The thing may be different for the ones who are investing in Bitcoin at its current price mark as only those may be financially free who could spend at least hundred's of thousands in it.
I agree with the fact that many people underestimate the importance of Bitcoin when it comes to its true nature. Bitcoin is actually an asset that can be considered as a store of value and it doesn't bear any other expenses for the ones who have bought it other than the transaction fees. In that sense we can consider Bitcoin as a great source of value and it can be grabbed without much expenses.
Now a days the exchanges have made it easier for us to convert Bitcoin to any other currency with much expenses, but still with those exchanges we are loosing the decentralized nature of the Bitcoin with which it was made. But, if we ignore the fact of decentralization then it's a child's play to convert Bitcoin to any other crypto currency or even fiat without much fees or charges.