I don't spend my btc,because I have only 0.6btc in altcoins and that is very small amount,but sometimes I invest in the sport gambling sites like directbet.eu.
For me, 0.6 bitcoin is really big amount. I always spend my bitcoins on gambling sites like nitrogensports and sportsbet.io because i am a gambling addict.
It's quite small considering you daily needs, the bills, foods and your family expenses. Just be patient, don't gamble your earning, your might as well collect larger than 0.6 BTC. If you want to spend it, spend it in an activity which have lesser risk than gambling. But if you love gambling then invest it in house pot. That way there is more chance of you earning than losing your precious Bitcoin.
And you are claiming,that 400 usd is not a lot of money considering all the daily bills,food,electricity,water etc.
Dude,400 usd daily to spend,is a really big amount,you can live out of it without any problem and get some saving,and also entartainment.
For me either that is already enough for me for a month to survive. 0.6 bitcoin is already a big amount for someone who are starving and doesn't have something to eat.
And it can also help me with the tuition fee in my college school.
that's what gambling seems like ! in my case i use them for buying gift cards and mostly mobile top ups 
