We take a look at the performance of a scientifically reasonable but very simple 50/50 buy-and-hold investment strategy that stays clear of investing myths. To this end, the historical long-term performance of a portfolio that invests 50% in global equities and 50% in government bonds is reviewed. Even though this 50/50-portfolio does not include any complex trading and investment strategy, it lead to an impressive performance: CHF 10,000 invested in 1970 would have grown to a staggering value of CHF 170,600 by the end of 2023. While there is no guarantee that such a performance will be repeated over the next 50 years, we argue that investment myths are likely to be a significant drag on long-term performance that can be avoided.