Trump may be many things, but I can't imagine him falsely claiming to be a Messiah to save us all. Also the very idea of a single “antichrist” is not really in the Bible. John uses it in the plural in his gospel, as

1 John 2:18

“Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time..”

It’s warning against false teachings that can lead you astray basically. Numerology can lead you astray easily. The idea of a single future antichrist is a later synthesis. See Antichrist - Wikipedia (Wikipedia tends to be quite good on theology).

This is the alleged 666 on Donald Trump’s coat of arms:

It is very easy to find all sorts of patterns in events, numbers, texts etc. That’s because there are so many ways to combine letters and numbers. Mathematicians sometimes do this for fun. For instance, there’s a famous puzzle to write all the numbers from 0 to 100 using four 4s. This puzzle dates back at least to the late nineteenth century. It was published in an book by W W Rouse Ball in 1882, and earliest mention in print goes back to 1881. Four fours

Here is an example

7 = (4 + 4) - (4/4)

Can you write every number from 0 to 10 in this way? What about writing all the numbers from 0 to 100 using four 4s plus mathematical operations such as addition, multiplication, subtraction, factorial, square root etc. To get as far as 100 requires some serious mathematical talent, but it can be done. Here are the solutions: Four 4’s puzzle. You can go further also. This page goes up to 386. Representation of numbers with four 4's It follows that if you have some text that has four 4s in it, you can use numerology to transform it to mean any number you like between 0 and 100, or indeed up to 386 and probably further too.

And here is a fun spoof of numerology, short exchange of emails after 9/11: Numerology and Numerology Parodies

Previous presidents of the US have also been proved to be the “antichrist” using numerology. E.g. here is the proof for president Reagan Proof that ronald reagan was the 666 antichrist ! Basically it “comes with the job” - if you get elected as president of the US, someone is bound to come up with a carefully worked out proof that you are the Anti Christ.