Show them historical price charts from beginning to end. Btc vs USD. Cite how basic economics work and how having a finite supply will ensure that inflation is impossible with bitcoin.

Then show them an example of how an example proposed investment made before the start of hyper inflation would have protected them in the long term. So they can comprehend the ROI potential. Get some good old fashioned fomo going.

Toss in the words strategic reserves for protection against hyper inflation. Should be good to go.