"2018 - bitcoin's dominance is going to end
2019 - same shit
2020 - same shit"^ Statement by most altcoin maximalist. Yet, bitcoin's dominance remains.
I also thought an altcoin would topple bitcoin before but I've already come to terms that it's not going to happen. "Challengers" can have all their faster/cheaper features but they can't match Bitcoin's superior security.
Now let's tackle the opinion of the Blockchair's executive:
privacy is not the top cryptocurrency’s strongest suit as its network allows blockchain analysis firms to track user activity. Users who wish to keep their transactions private can turn to a number of altcoins including Monero, Dash and Zcash.
Users can still maintain their privacy when sending btc as long as they don't use centralized platforms though.
Bitcoin’s scalability is another nail in the coffin. He says the Lightning Network, which is a second-layer solution designed to make it faster and more cost-effective to send BTC, is fundamentally flawed.
This is an old issue. He failed to address that people who support bitcoin knew this long ago but they are willing to give up the convenience of scalability in exchange of network decentralization and security.
He points to Ethereum, with its proof-of-stake (PoS) protocol, as one coin that could topple BTC.
Ethereum's POS looks good on paper when it comes to scalability but this has yet to be proven. There are plenty of existing blockchains who can scale better than Bitcoin but none of them were able to dethrone btc.
The upcoming upgrades, Taproot and Schnorr signature, are also said to increase privacy and scalability. Perhaps he failed to read on that as well.
you are right. we are already in 2020 and some people are still believing that same old line -
bitcoin's dominance is going to end. And yet we are still here, bitcoin still on top of the chain. The popularity is just getting stronger everyday. Alts come and go, many have attempted to create a "better and more powerful" alt than bitcoin but most of them failed even in reaching out to popular exchanges. We have had enough of this same old propaganda. Let's accept the fact that even with bitcoin's shortcomings, it still remains to be the sought-after crypto in the community.