What planet does gibster live in. The only services that accept bitcoin are online drug dealers and prostitutes (according to what that guy said a few pages back).
This is an illogical, false, and irrelevant comment, which has already been explained to you many times.
Bitcoin can be exchanged
for any good or service anyone is prepared to provide in return for it. So, if you take me as an example, I will take Bitcoin for anything I may wish to sell - house, car, shares, collectable items, gold, personal training advice, financial advisory services, etc.
Second, you are confusing the concepts of a day to day medium of exchange with a store of value. For example, we don't go around buying things in gold. But if we want to use gold to purchase something, we can always exchange the gold for fiat currency and then pay with that. My Bitcoin Visa card, allows me to do this seamlessly anywhere in the world that accepts Visa.
Most 200+ fiat currencies are ONLY commonly accepted in the country of issuance. (So for example, you if you tried to use a Swiss Franc in a McDonalds in USA, they would not accept it). But you could exchange that Franc for USD at the prevailing exchange rate, and then use that. Same concept with Bitcoin (only Bitcoin is already the most globally accepted international currency, or at least right up there with the USD as being accepted globally beyond country borders).
Further, when assessing an investment, we need to look towards the future. So, if you you believe that BTC being used as a medium of exchange is correlated to its value, then you have to make a prediction on how BTC will be used in the future. Is Bitcoin the next logical step in a globally accepted currency? Will the trends we are already seeing of an increasing number of countries formally (or informally) adopting BTC as a currency continue? Will the rapid growth of the 2nd layer Lightening Network continue. Etc.
You have now been educated. Always try to think at least one (or ideally 2) steps ahead. It will do wonders for your success and serve you well both as an investor, and in life in general...