140K to invest in marquets: which ETFs?

How confident you are about markets going up?
I’m 42. I invest not for me but my little children.
I should have invested into some dividends etfs in my age, but I’m struggling to get a permanent job and want a mortgage which is not possible.

No one can be sure of anything. I guess if we spread our investments, meaning going for a diversified portfolio, under “normal” circumstances , the world economy will grow over the years…
(I was so off the day i wrote this post, I noticed later I misspelled Markets…)