In the latest bidding for certificates of entitlement (COEs), it was reported that Uber-owned Lion City Rentals managed to secure 510 certificates ("Fierce bidding by Uber keeps COE prices up"; April 21).

This means that Uber has elbowed out 510 ordinary people hoping to own a new car.

While the Government does not intend to protect taxi companies from the likes of Uber, the latest COE bidding results show that private-hire car services have an unfair advantage ("Study impact of new private-hire car market" by Mr Wong Weng Fai; April 21, and "Concerns over private-hire car firms driving up COE premiums"; April 24).

Taxi companies are not allowed to bid for COEs, so allowing Uber or Grab to do so is puzzling ("Uber's expansion drive changes the game for cars"; April 16).

When Uber first came to Singapore, I had the impression that it would serve existing car owners who may want to earn some money by giving rides to others.

If this is the purpose, it would be right to restrict its fleet to existing cars and car owners.

Therefore, in the interest of the public, it ought to be limited to only cars that have been registered at least six months ago.

The Government should not allow, in effect, an unlicensed taxi company to be disguised as a car rental company.

Ng Kok Beng