Person who puts in motion the conversion of money into assets, in hopes of income and capital appreciation.  Puts money in-vest. The term investment implies that a business or investment risk can be analyzed and measured, and its distinction from Speculation is one of degree of risk.  Investors are more focused on the steadiness of returns brought by dividends, interest, and royalties. Whereas a Speculator seeks primarily capital appreciation. The buying and selling in search of profit from rise and fall of market value is recorded from 1774. 
The word investment originates in the Latin "vestis," meaning garment, or vest, and refers to the act of putting assets into others pockets.  A person puts money in-vest, so as to receive profits in there own pockets.