Bitcoin is the best crypto currency, nothing can beat it, just see the transaction volume that being made everyday and look at the price stability, it is a superb digital currency, i only used other alt coin to do trading but for investment, i only choose bitcoin
Anyone who really knows the crytocurrency space will certainly agree that Bitcoin is the best cryptocurrency available on the market, for the reasons you have spoken and also for the fact that all other cryptos competing with Bitcoin do not have the same user base, nor the same level of decentralization.
However, we have to be careful when saying that no other currency could achieve the same level of success, because human knowledge is something that increases at an exponential rate... That's the main reason why Bitcoin needs to have the best developers, If they want the currency to continue to lead the market.