Investment Trust have been around for over 100 years and followed the trading houses and market traders around the world, who traded in commodities.
Investment Trust share shares are held by the Banks, Insurance Companies and large Pension Funds. So you are in good company as a share holder.
Investment Trust invest globally and have Capital Growth, Income, Split-Capital, Venture Capital and Equity Capital trusts.
Check them out at:
http://www.trustnet.com
and
http://www.whatinvestmenttrust.co.uk
There are warrants which give the holder the right to buy shares at a pre-set price and if the share go up in value the warrants can go up by 100%, so capital gains are possible. Equally losses or no movement can occur.
Also worth checking out are investment trust saving schemes and their ISAs which are normally very low cost way to buy shares in the related Investment Trust.