By Alun John, Amanda Cooper, Hannah Lang LONDON (Reuters) -Bitcoin dropped below $90,000 to its lowest since November 18 on Tuesday, as market nerves over U.S. tariffs reinforced the blow to crypto investor confidence from last week's $1.

Bitcoin, BTC= the world's largest cryptocurrency by market value, broke below $90,000 to its lowest since November 18, falling by as much as 7.5% at one point. It was last down 5% on the day at $89,314.

Bitcoin slid below $90,000 on Tuesday, hitting a level not seen since November, amid a broader struggle for cryptocurrencies this year so far. The No. 1 cryptocurrency was down 6.5% to $89,896, around levels not seen since mid-November.