If you lose all your stakes, can you add more stakes and bet again. Was the stake of last bet was already too high, you could not add more? Was there a limit of maximum stake?
Maybe he lost too much, and didn't want to lose money any further. Statistically, once you've played long enough, you should always even out. So the only strategy on dice is to play, play, and play.
Well you should be close to even, statistically. If you are playing a game with a house edge that means you should lose roughly what the house edge is. So statistically you should lose a slight amount the more and more you play actually.
Example: You play 10 rolls, you should win about 4-5 of them. Betting the same amount .01 each time you should be about 0-.01 down.
You play 1000 rolls. You should win about 490-495 of them. You should be down about .05
You play 100,000 rolls. You should win about 4900-4950 of them. You should be down about about .5
So on and so forth.
Thinking about this, its a good strategy to flat bet if the casino offers cash bet bonuses/reward tiers. You would be able to get the reward or have a higher faucet, thus giving you more BTC than using any other strategy.