The right thing is to buy Bitcoin with only discretionary income so that they will not be under pressure to cash out all their Bitcoin at any time. If they sell all their Bitcoin, they will run out of Bitcoin thereby defeating long term hold which is the recommended way of going about Bitcoin. If you have no discretionary income, then it is time to find a job or look for way of improving your finances before thinking about investing in Bitcoin.
If you see basic and chronic unsolvable issues from governments, central banks and fiat currencies with inflation and considerable decline of fiat currency purchasing power, you will try to find alternatives that have less inflationary rates or no inflationary or deflationary.
Bitcoin is inflationary too but its inflationary rate is halved every 210,000 Bitcoin blocks that last about 4 years. Inflation rate halves while Bitcoin adoption rate possibly soars more than two-fold every four years, and this imbalance between new supply and demand will create buying pressure on the market, so that Bitcoin price will be lifted up naturally by new participtans, demands and capital they add into the market.
Equivalent Network Time is a topic that visualizes effects of Bitcoin block reward halves on time to buy same 1 bitcoin over time and cycles.