1950 gibson guitar

how much my guitar will be worth in 20 years?
I have a Gibson Les Paul faded double-edged sword "that I bought for about $ 900 of insurance. na when I bought it I know I could invest in this sector. but a friend told me to wait, like 20 years and will be worth much. So I went online and saw guitars Gibson, from 1950 "and they were sooo expensive. U.S. $ 5,000. Mine will be worth so much?
Much depends on the model number and how many have been sold of those sold will still be around in 20 years.
1950 Gibson LG 2 guitar