From the things I understand about there reasons of not being able to buy Bitcoin is actually the price so there is no strategy that will give them a lower rate of buying price of Bitcoin because any price it has is what everybody who wants to invest in Bitcoin will buy, meanwhile is mostly after buying you can be asking for strategy, unlike before alot of people were inexperience of knowing how to navigate into strategies that will make them moderate on there investment but now there are strategies people has been talking about they usually use on Bitcoin, I don't no if you have heard about DCA but you can read about it to no more because I no is a strategy for a lot of people.