There is no “should” to it. It is a choice. No one should be compelled to gamble, including in the stock market.
Just like the use of alcoholic beverages, use moderation. I am a stock market investor and small time horseplayer myself.
No one can defend the Libertarian Platform. It is totally modernist. While Jesus died on the Cross, Roman soldiers gambled for the rags He wore. Gambling is a sin.