No doubt it will become a classis. Of course you have to wait 20 years or so.
Cars can be a great investment if you treat them like an investment. Buying a brand new car and waiting 20+ years to see a return is a pretty bad investment though. You would also have to leave your heart at home and buy strictly for the investment purpose. I have no doubt if I bought a 1973 RSR clone it will be worth double in 5 years. Same with my 914-6. It's already worth alot more then what I bought it for.
But I look at it more of "In case things get bad I can always sell it".
The beauty of buying and selling classic cars is if you are smart about it you can gain money or break even. To me thats a plus over buying a newer car. In a new car I will never see my money back. Well unless I wait the 20 years.
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I love the life but I never sold my soul...