Do UK Royal family have too many properties? Many homeless. Is UK attitude to Royals Century old? (when Phillip born). Do others laugh at UK?

Actually, many of the upper classes of the world envy the british royal family precisely because they own all of that property while people at the opposite end of the socio-economic ladder suffer.  Worse yet, the royals have conned british taxpayers into PAYING the royals to own all of that property (106+ million USD last year) for doing little more than using an oversize scissors at ribbon cutting ceremonies.

No they dont and the Only reason for the House Shortage is the Bloody Plague Of Muslims in the UK Stealing Homes Jobs abusing Babies and setting up Grooming Gangs

The properties  are owned by the British public

You are not aware that many rich people have several properties? Some even own islands!

Intelligent people know that monarchy is just another form of government.

Britons change with the times, and the monarchy makes changes as well, slowly, but it does change.

Other people do not laugh at the UK. There is no reason to laugh at the UK.

Homelessness exists all over the world. We have many homeless in the US. There are many office buildings and stores that are empty, but rich landlords are only interested in making money.

Many of the buildings used by the royals are not private property, being monarchical property, only for the use of the monarch. The Queen privately owns two homes.

Yes. We are laughed at for the royal farce. Fancy dress pantomime to draw in tourists and appease the lowly-educated. 

Homelessness isn't unique to the UK.   If anybody wants to laugh - be my guest!!

There are some rich, and many poor/homeless all over the world. USA has half a million homeless.

At least they employ a lot of people. There are ultra rich people in virtually every country in the world as well as very poor poor ones.

Cogito ergo sum.... 

Some of the properties they use are owned by the state, some are family-owned and have been passed down through many generations.  Many are open to the public.

Most leaders of countries have access to many properties - the USA has several properties for use by the president.

I don't know what you mean by our 'attitude' to the royals - we've had monarchs throughout history and it's an important part of our history.  What has 'when Phillip born' got to do with it?  I daresay some people laugh at the UK, but many people laugh at the USA as they do at most countries.