Yes indeed saving little by little is the most effective way to collect bitcoin because the amount will decrease along with halving.
Yes that's true, those who have money can always buy how many Bitcoin they want, this is a good playground for those who have money, I remember a few months ago when the market crash because of one whale cashing out in the market, hopefully in the future equal number of people will have a share of Bitcoin to avoid market crashing because of one whale.