I always bet small amounts but in some games. Usually around 0.001 btc. But in sports betting if there is a big game I would bet big, because I think it would be very interesting if betting on the big game. As in the final game, I bet BTC 0.01 to 0.07 btc.
It is still considered as small amount as some people make a bet on an event for 10 to 1000 bitcoin.But at least with small amount to bet and limited bankroll you have a lower chance to get addicted.
Make a limit on your winning bets and loaing bets always recommended no matter you bet low or high.
No problem if you are betting only 0.001 BTC because that is affordable to lose. In that amount I also started and upon playing dice sites I can say that you can already enjoy that small amount in dice sites depending on how much you wanted to risk your bitcoin. But I don't want to take that much risk so I want always to be in safe haven.
Not only a few peoples are here who using the small amount in gambling, Even i read a many threads, and i saw a lot of peoples are here who using a small amount in every bet, because they can afford it, also included me.
It doesn't mean that we have not enough amount to using, actually it has mean, peoples can't afford a big risk. But in the start, i think everyone have used a big amount in gambling, So that's why they know should be-careful in gambling, and control our greediness.
Putting up small amounts on the first place is somehow a strategy for us in able to avoid much loss and somehow we do observe if we do have luck on that day or none. Being a risk taker is not a good thing to do unless if you have the money and guts to do it then its okay as long you are already aware on the possible outcomes that might happen later on.
Depends of an event 
