1: Don't lose money;
2: Never forget rule No.1.
对于一个以不输为出发点的人,别人想赢他非常困难。
I don’t want to buy into any business that I’m not terribly sure of. So if I’m terribly sure of it, it probably isn’t going to offer incredible returns. Why should something that is essentially a cinch to do well offer you 40% a year or something like that? So we don’t have huge returns in mind. But we do have in mind never losing anything.” - Warren Buffett 1998 Talk at University of Florida