Asset classes
Risk-free
No asset class is risk-free these days.
Even cash deposits at banks are exposed to the risk of the bank or the state becoming insolvent. Inflation causes cash to lose more than 40% of its value over a 20-year period.
Adopting a long-term perspective for the best returns
From a long-term perspective, investments in stocks show the best returns. For example, the average annual growth of the S&P Index (the US stock index) between 1985 and 2015 was 10.28%.
Example:
Let's assume you invested a sum of €50,000 in the S&P in 1985. By 2015, this would have increased to the massive sum of €941,613.