Can I still get in?

To be honest, I'm really not good at buying when prices are rising. If I can wait for a pullback, the range between $4500 and $4600 is quite a good entry point.

How high can ETH go?

As long as ETH breaks through $4800, the upward potential is significant. If we calculate based on BTC potentially reaching $600,000 in the future, and BTC is currently at $120,000; then if ETH can break its previous peak and double, it could reach around $10,000. However, ETH also needs to rise gradually; it can't just jump to such a high value all at once. Let's wait for it to break $4900 first before discussing further!