Most of us have done this unintentionally.

The market does swing up and down, but guns of good original quality in good condition will never lose value.

The guns I bought more than ten years ago have on average nearly doubled.

Do take advantage of IRA's and 401K's where available because that's deferral of today's taxes (not 'savings' as the genius advisors always say) and likely to pay off in the long term, but once those advantages are exhausted, quality iron is better than most investments.

Besides, it's fun.

"The price of good shotgunnery is constant practice" - Fred Kimble