We see that's some of the cryptocurrencies ranking level are decreased such as dogecoin before it was ranked #4 but currently I think it doesn't listed even in top #10 ranking... So can bitcoin also decrease its rank in the future or it will remain #1 rank forever?.
Nothing do last forever- keep it on your mind.We cant tell if bitcoin would able to have that top 1 rank forever.There would be always new and updated
coins which is more better than btc itself so the probability of being replaced on top spot is always there.For now it remain on the top spot for 10 years since
it was created knowing that this is the father of all crypto.So its really hard to believe that it would be replaced anytime soon if we do base up on the
demand and support of the entire crypto community. Bitcoin is always preferable and its value is the solid-proof.