when all a nice looking altcoin brand ended into scam, what's the significance of it nice designs.
When the design is such that the coin creators have no way to get coins cheaply and no way to profit from it, how can it be a scam?
You can design against scams:
* Proof of Work
* Coins can only be obtained by mining (i.e. no premine/mining tax etc)
* High initial difficulty
* Optimized miners available at launch
* Emission not too front loaded
... etc