Terminology and risk
An investor may bear a risk of loss of some or all of their capital invested.
Investment differs from arbitrage, in which profit is generated without investing capital or bearing risk.
Savings bear the (normally remote) risk that the financial provider may default.
Foreign currency savings also bear foreign exchange risk: if the currency of a savings account differs from the account holder's home currency, then there is the risk that the exchange rate between the two currencies will move unfavorably, so that the value of the savings account decreases, measured in the account holder's home currency.
In contrast with savings, investments tend to carry more risk, in the form of both a wider variety of risk factors, and a greater level of risk.