Collateral : cash component

Inorder to get the cash component as collateral ,

I have shortlisted the following 3 components .

  1. Gold - SGB
  2. Gilt funds
  3. LIquid bees

Currently Gold hold 50% of portfolio in cash segment remaining 50% I want to diversify , which one gives the better returns Gilt funds or liquid bees , if any one can throw some ligt on it it would be of great help to me