Crowdfunding money jar full of coinsSpurred by the frenzy of mid-century modern furniture of the 1950s and 1960s returning in popularity, a growing number of collectors are investing in and holding vintage furniture. Capitalizing on that craze, N. Stile Sune’s start-up Mothbalz Antiques cannot grow fast enough to meet demand. To buy more old warehouses and re-fit them into climate