Hey Simon,
That is quite an interesting topic here from your side.
There are indeed strategies that last for longer, and it is a good point if we can point out something in common between them.
I remember I had a 1:1 class with one of our traders, I think it was Roman, and he shared that one of the Bitcoin EAs that I shared last September 2018, was still profitable. It would be great if he shares what happened with that EA :)