Even though the price of BTC can reach tens of thousands of dollars, it is not a guarantee that BTC can be safe heaven. The bitcoin market volume is still too small to fulfil the concept of safe heaven assets where traders divert money from risk assets to safer assets to maintain investment value when risk and losses increase. IMO, regulatory issues also increase manipulation and the level of fraud risk.
BTC continues to grow according to its characteristics, it doesn't have to replace gold to become popular because it has a strong character. A good investor will certainly take advantage of both, depending on the right conditions and timing.