While many would agree that the stock market has been the best tool  historically to building long-term wealth, cryptocurrencies have taken  that title in the past several years.

Bitcoin and Ethereum, for example, have produced trailing five-year returns of 700% and 310%, respectively, compared with the S&P 500's total return of only 73% during that time.

But with cryptocurrencies getting absolutely hammered over the past few months, now is a good time to reassess your  investment philosophy and the path you want to take to achieve adequate  financial returns.

And if you want to retire a millionaire, a valid argument can be made  that avoiding crypto altogether might be the right course of action now.

With stories of individuals becoming millionaires virtually overnight by  trading digital assets, a fear of missing out can no doubt be the  feeling many non-crypto investors have been experiencing.  

It's human nature. We see others having incredible success doing something and we immediately want to copy that behavior. 

The problem, however, is that it completely goes against what a rational person should do.  

What really matters is how much a person is consistently saving, the  time until retirement, and their risk tolerance. Building a financial  plan that helps one achieve personal goals is the ultimate objective. 

While some cryptocurrencies have crushed stocks in recent years, they are not the right investment for everyone.  

For starters, digital assets are ridiculously volatile with daily moves greater than 10% a normal occurrence.

And because the sector as a whole just started its teenage years –  Bitcoin was launched in January 2009 – the potential range of outcomes  for the still-nascent asset class is extremely wide.

Forget crypto. This is the secret sauce to retiring a millionaire.