what needs to be kept a secret for Bitcoin, everyone will find out.

What you say predictions, analyzes, media does more.

Just tell me where the source is, don't be ashamed to publicize it.
Like this:
1. Bitcoin Price Prediction 2019, 2020, 2025, 2030, 2040 - Bitcoin Future Value Prediction
2. Bitcoin Price Predictions (2019 Update)

Is this a secret, no.
Many things that you didn't know will happen in the future, towards Bitcoin.