Greediness is somewhat hard to control especially if you are living it. Of course, you can easily just think we can but the moment has come, when the price spikes, we just even think there is more. We commonly just say "don't be greedy" but in most cases, "we then just fail to follow".
Don't be greedy? unless if we don't need money.

As being an investor, we certainly live with this, we want more and that is why we risk more. For me, it wasn't bad for as long as you know how to manage it.