I would caution against increasingly turning to risky investments to obtain that bit more profit while interest rates are low. At some point, interest rates will rise again, and then the financial burdens stemming from property loans will not be the only thing to increase. Both borrowers and lenders have a duty not to ignore this risk.
1 H. Esselink and L. Hernández (2017), The use of cash by households in the euro area, ECB Occasional Paper  Series, No. 201, November 2017. 2 Deutsche Bundesbank (2018), Payment behaviour in Germany in 2017 – fourth study of the utilisation of cash  and cashless payment instruments.