I don't think I would do it if you're looking to make money out of it, particularly in the short to medium term. The whisky market has really slowed over the past year, from what I've seen (new releases not selling out, when they would have gone almost immediately before, much lower auction prices, etc), and there are loads of new distilleries out there that are all fighting for a share of a smaller pie. Also, my brother (who is much more into this than me) pointed out a post from a whisky broker last year saying they're seeing loads more people/small businesses trying to sell all of their stock, which doesnt bode well for prices.
If you're thinking about buying a (part share in a) cask for future bottling and drinking, that's a different matter, though I wouldn't do it myself - I don't think I could ever like a particular whisky enough to want a couple of hundred bottles of it! I have come close a couple of times, but that was more because I would have liked to support the distillery itself.
Please note that this does not constitute financial advice!