Re: Can the lighting network eliminate most of the cryptocurrencies?
And if the answer is yes, what are the coin that will survive thanks to a technology that can be replaced from LN? I was thinking for example about the STRATIS coin, the platform is very particular and even if it's based on blockchain I think that it's very different from the blockchain of bitcoin, or not? Thank you, I'm not an expert on blockchain code 
No, Lightning network will not eliminate most of the altcoins it even doesn't have any bad effects on other cryptocurrencies, it is just a solution to Bitcoin's scaling problems and does have anything to do with other coins. As we already know some there are some cryptocurrency that are just almost the same with Bitcoin (like Bitcoin fork coins) those coins will eventually not survive the market even without lightning network, but coins with continues development and focuses on other things will of course survive.