It is still worth to use bitcoins because the value has increased and satoshi's will still be on the same track. Before you are thinking that 0.005 BTC is still a cheap amount of Bitcoin but right now the price is high and you may think it's gold and you can now reduce it to lower amount. But if you don't want to do this, you can just simply use alt coins.
Yes before I use to bet min 0.005 BTC actually I will place 0.01 BTC when ever I play sports betting. Becasue I will get a decent return. But what you said it is right it becomes too costly if I convert 0.005 BTC to our fiat currency it is approximately one day salary for two years experienced IT people. Now tell me is it fine to play gambling with Bitcoin?
gamble using bitcoin always come with its risk , so you should really know what you are doing. i mean for example when you bought 1 bitcoin worth $2,200 and you successfully make it double to 2 bitcoin but then the price move up so fast up to $4,400 guess how much money you make during that volatile? yeah you have made $2,200 to $8,800 instead to $4,400 but vice versa when the price dumped half and so on.