How to avoid spam in Telegram chats.

As many of you, including myself, are present in many Telegram chats, all linked by a single thread: cryptocurrency.
Lately I've noticed that in these chats, especially when the number of users exceeds one hundred, and even when the chat is public, there is an increasing number of infiltrators that spammed with links to any topic in a continuous and very annoying manner.

I have experienced many chats in time and wanted to share some of your options with you to prevent this from happening again.

1. A chatroom of up to 100 members can keep it public, beyond becomes risky to spammers infiltrate harmful to the group. So you should make it private. Create a supergroup only after reaching 200 members.

2. Create Invitation Links to include in the chat only trusted and known people from the most important members of the group.

3. Select at least 2 group administrators up to 100 users, 4 for 200, and so on, of course trusted users.
   By doing this, you can always monitor the content and immediately slip the malfactor.

4. Report to @spambot any malicious intentional user.

5. Sometimes spammer users are actually bots that are specially inserted, and you do not want a bot to send you messages, feel free to block it. Some Telegram apps have a "Stop bot" button right in the bot profile page.
   That said, most bot developers, offering commands that deactivate the bot, search with bot command / help for suggestions.