The application of lightning network on BTC will make the transfer speed of BTC faster, and the transfer will not be charged!
Perhaps the BTC will be the only remaining digital cryptocurrency in the next decade!
Other digital encryption currencies will be eliminated!
The lightning network is going to make the transactions of bitcoin faster that is correct but transactions are not going to be free you are still going to be charged a small fee, it is thought that the fees are going to be very small but it will not be free, and this is one of the reasons of why many people do not even bother to invest in altcoins because they think that at the end bitcoin is going to be one of the few cryptocurrencies that are going to exist for the long term.