The best Telegram group for crypto signals is one that provides reliable and significant signal services. The best channels sell signals and offer various types of daily crypto signals (but with signal accuracy), including short-term and long-term trading strategies.
Some channels provide only trade signals, while others offer trades, fundamental and technical analysis. You may find some that say that they better signal services by saying that they have an automated trading bot like Cornix or a smart trading bot that delivers signals.