How do you write a short welcome?

I'm curious, how does one craft a concise yet warm welcome message? It's important to make a good first impression, especially in the world of cryptocurrency and finance where trust is paramount. I'm looking for some tips on how to balance formality with friendliness, ensuring that my message resonates with both seasoned investors and newcomers alike. Can you provide some guidance on the key elements to include and the tone to strike when penning a short yet impactful welcome?