Bitcoin holds near $84,300 amid Fed Chair flags tariff-linked risks; Altcoins trade mixed

Bitcoin steady above $84K despite Fed's tariff warnings; altcoins mixed.

Ethereum lags below $1,600; Solana rebounds 3% to $130.

Market cautious amid macro risks, miner activity, and regulatory concerns.

Technical view signals downside, with key support at $76K and resistance near $89K.