An old trader who has had better days and mostly still relevant because they have a strong reputation for the fact that he has been trading for a while, or would you trust a new trader who is hot in the market and fresh with new strategies?
If there are other good traders that are happily sharing their wins and strategy, if it's possible to know their losses then also start to know about it so you'll know what are the lessons that you should take from them.
But if with those choices, then you should choose the one whom you can learn with. Based on that description you've given, if I'm hungry for a mentor or tips then I'll go with the first choice.