Most currencies have a state or central agency backing them, whereas Bitcoin may as well be raiding monopoly boards for the colorful bills. Also, there's typically ways to track your purchases and leave trails with actual currency and you can't accidentally delete your dollars.

On the other hand, there is a finite number of bitcoins, unlike any of the traditional currencies that were bound to gold at first but which has since been cut loose because said central agencies wanted to create more money (all "real" money is fantasy money by now, because they are no longer bound to a limited good).

Yes, bitcoin is roughly a digital equivalent to gold. There is only a certain amount available to mine, and good luck tracking how many - or which - hands that nugget has passed through.

Leading to said 'gold' being more worthless than the shiny yellow rock and only useable in suspicious transactions or cashing out.

Also, it should be noted that many fluctuations were caused by simple trolling. Here's one such thread. (Also, the original Bitcoin thread in SA's comedy goldmine archive is currently MIA due to database replacement.)

true, but i heard from a few people i play online games with (browsergames) that they were able to block it, and undo the transaction, it took some time , but sometimes it can be done apparently.
I can only use prepaid, so i know what my limitations are, i always make sure i check all things i buy prepaid, so i havent got any problem yet.
So sometimes it seems possible thats the only thing i know.

True, thats why i responded cause i have only read an heard negative things about bitcoins.
One 'easy' thing might be to have store credit next to the usual payments using the default options and all possible payments,
by transferring cash using various payment methods, from the usual cards and money/bank transfer all the way to prepaid, with the exceptionof bitcoins because of all the formentioned reasons..

That storecredit that will be created on that site however should never expire, cause our dollars, euros and other valuta also dont expire when we dont use them for a while.

steam has a wallet option or something i once read , ofcourse i dont use it cause suppose something happens, and lots of userdata gets 'trashed' on the servers/databases then you might loose lots of cash in that wallet, so i think its safest to pay when you want to buy someting , this way there wont be hundreds of euros or dollars spend, lying on a account.

The way we get games now, buy game(s) then check the payment method we want to use and, voila we have the game(s) we ordered.
I havent got any problems yet.