While it may seem like common wisdom to actually invest in stocks or even to invest in general, there are some very specific reasons why anyone (everyone) should invest in the present. The long story short is that there is truly no better proven strategy to guarantee success and returns in the long run.

The idea of buying a single company means you are bearing all of the risk. According to Velocity Cash, by seeking out and discovering the best companies and owning shares in each of them, you can spread your risk over many different investments. Diversified portfolio theory is not just a fun trick, it's a strategy that actually works over time.

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Minimized Lifestyle Spending

While this one is a little more of a behavioral aspect of finance, it is not any less true than the others. If you make a given amount of money, but you are used to saving a certain percent, then you are only in the habit of living off of the remainder.

In other words, if you save 10% of your income and only live off of 90%, then when you actually want to retire you only need to produce 90% of the income you are currently making!

It might seem like a small point, but saving now conditions you to live more comfortably off of less in the long run.