Why this key Bitcoin price trendline at $100K is back in focus

bitcoin
Bitcoin (BTC) $ 81,432.00
ethereum
Ethereum (ETH) $ 2,381.60
tether
Tether (USDT) $ 0.999121
bnb
BNB (BNB) $ 727.07
xrp
XRP (XRP) $ 1.29
solana
Solana (SOL) $ 103.95
dogecoin
Dogecoin (DOGE) $ 0.078955
chainlink
Chainlink (LINK) $ 11.92
shiba-inu
Shiba Inu (SHIB) $ 0.000005
nexo
NEXO (NEXO) $ 0.807948
enjincoin
Enjin Coin (ENJ) $ 0.026684
cardano
Cardano (ADA) $ 0.215553