I think, Martiangle is a good strategy but very dangerous if used constantly, I've lost 1 BTC because this strategy.
Yes you can said that but I think people always use it when he is really have a lot of btc and never do this martiangle if you can afford the lose, besides that you must know when to stop, if not sure you will lose all of it like I did before. Losing all of 0.8 btc and didn't left any penny. But if you are really lucky may be you can play a lot of this martiangle