Most ethereum killers are dogshit.
Some are slightly better but still won't get adopted.
That includes Tezos, Cardano, Matic, Cosmos, and many others
Polkadot has been hyped as fuck but as far as I can tell nothing is happening on it.
While ethereum is likely to remain the king, Avalanche is the only one with a real shot at overtaking it.
Here's a good thread on the technical reasons why:
https://twitter.com/kevinsekniqi/status/1346213042439278592
Very soon (this month), avalanche will be getting its first major dApps: pangolin (a uniswap style exchange on avalanche, with yield farming) and bZx (a margin trading/borrowing/lending platform that already exists on ethereum).
Once avalanche gets these, it will immediately have more activity than any other ethereum killer, despite being newer than most of them. bZx in particular shows how easy it is to port over.
Imagine being able to do everything you currently do on ethereum, except transactions are instant and cost a couple of cents, even if avalanche had 10x the activity that ethereum currently has?
People are going to dip their toes in Pangolin. It has yield faming, with major tokens like LINK, ETH, WBTC, YFI, Aave etc.
They're going to see how fast and cheap it is. They're going to see that they can margin trade on bZx on avalanche instead of ethereum, doing the same stuff they were doing before but way cheaper