IOI Properties Berhad

What are the benefits for one to hold on to an unlisted company's share, in this case, IOI Properties Berhad?

1. Holding period more than 5 years, in anticipation of dividends and potential exit offer from IOI Corp?
2. Upstreaming of dividends from IOI Prop may not be visible in next two years, but it's still possible in subsequent years.
   
3. Offer price of RM2.598, if compounding at 10% per annum, it will be RM4.18 per share 5 years later.
4. Can IOI Prop survive by then, after impairment of Sentosa Clove Project?
5. Will Singapore and Malaysia economy recover and reach the price recorded in 1st half of 2008 by then?

If the answers are 'yes', why not wait for IOI Prop to recover and a really good exit offer from IOI Corp?