How high can Ethereum really go?

I've been hearing so much buzz about Ethereum lately, and I'm really curious about its potential. Just how high can this cryptocurrency really go? I've seen some predictions that are quite optimistic, but I'm also aware that the market is volatile and unpredictable. Could you shed some light on this for me? What factors might influence Ethereum's price movement in the future? Is it a good long-term investment, or should I be cautious and only invest what I'm willing to lose? I'm really eager to hear your insights on this topic.