Bitcoin is struggling again after a brief comeback. Here's what's keeping it down.

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• Bitcoin was struggling to hold $70,000 on Monday after last week's chaotic sell-off.
• Other assets like stocks and metals have been recovering, but bitcoin continues to flail.
• Commentators laid out a few reasons for its ongoing struggles on Monday.

Bitcoin bounced off its lows last week, but it's struggling around the $70,000 mark on Monday.

The token's decline brought it to nearly $60,000 last Thursday, before it snapped back on Friday.