(FinanceAsia) - Asia's growing thirst for fine wine has helped Hong Kong become the world's biggest centre for auction sales, and makes a compelling case for investment, according to wine auctioneer Acker Merrall & Condit.Europeans are spending less money on wine these days, due to a change in drinking habits and the weakening economy, but strong demand in Asia is keeping the industry's growth story alive, according to M&A International, an M&A boutique.