New Guy - with an old question



I am new to this forum, and have a question that I was always curious about. It has more to do with stocks than FX.

The markets always go up over the time, that's a rule of thumb. Most day traders are losing. Why not just buy blue chips, add and then add more (over the years) and then just realize gradually?
I believe the modern strategy is to buy ETF's rather than actual stocks. Just remember that, even, though it is a good strategy, using a FX platform to hold stocks long term is not a good idea. The trades are highly leveraged and the carry fees are a killer.