Investing is Widespread now in the Society such that the Inability of not Investing, is Paving a room for not Benefitting from the Outcome.
And Right now Investing in Crypto is a yardstick of measurement and has created an opportunity that's reliable and trusted..
But I really can't tell how thus Investing in The Economy will help one's Country.
What investing really does is potentially help your country to keep more of it's wealth "in house" as it were. If you are American and buy shares in American companies, you help to keep all the earnings and subsequent profits within the borders of the USA if you live there. It gives you more say over what direction the company can take, at least in theory (but you would need to become a major shareholder to have any actual influence). The alternative is your companies being potentially taken over, useful parts like intellectual property and technology can be taken overseas which might make it harder for your country to be successful in the longer term.