I agree with you. Trump has already won and he will fulfill his promise. Bitcoin price surged largely as a result of his win, and other cryptos continue to soar. But the reality is that you should keep buying and the pumping has started and may continue for a long time.
We can't say for sure that "he will fulfill his promise" because he has just been elected. For sure, there will be more important things for him to look upon before he turns his head towards this matter, however, as @tvplus006 said, the actual surge will only happen when he does something real for cryptocurrencies and Bitcoin in general. Until then, we will have to wait and watch.
If he turns out to be a liar and doesn't fulfill his promises, along with him losing credibility and a lot of support, the market might see a short-term dump which will make things a bit more difficult for Bitcoin's journey toward $100k as speculated by the majority of people in the market and industry.
So let's hope that whatever he did wasn't just a political gimmick to gain support and get more votes to win the elections and he actually shows some support towards Bitcoin and its holders and supporters.