Jorge, this is another example of you discarding information that doesn't meet your starting criterion of bitcoin = scam.
Confirmation bias doesn't do you any favours.
I have no reason to believe that Bitstamp is insolvent, but, if it were, it could and would easily fake that test. That the test is accepted without criticisms only confirms how gullible bitcoiners are.
Bitcoin is not itself a scam, but I have never in my life seen an economic sector so chock full of scammers. Every crook in the world who learns a little about bitcoin would want to "adopt" it. It is a much more lucrative and "safe" vehicle for scams than the classical ones -- stolen credit cards, counterfeit cash, phony viagra, nigerian heirlooms, penny stocks, ponzi funds, ...
I remember people saying something similar when something called 'the Internet' started to gain momentary popularity in the late 90s. Thank goodness that didn't work out.
Bitcoin is a protocol. The rest will get worked out along the way, just as it was/is with the Internet.