Today, the sentiment across the internet has dropped to freezing point. As an old investor who has been through two cycles, this level of decline really isn't that scary.

The experience of old investors is that after a black swan event, there won't be another in the short term. The best time to buy is after several sharp declines; if you're not sure what to buy, just buy Bitcoin.

The U.S. government shutdown has just ended, and Luxembourg has already converted 1% of its sovereign wealth fund into Bitcoin. European capital is also rushing in. Just watch, in this upward trend, good news will come one after another.

At this stage, it's all about controlling your positions and buying on dips.

Never go all in; leave yourself some room for error.