I follow various signal trading groups and I must say that they are often 50% of the results because nobody can know what happens in an investment in crypto if they knew they would be millionaires instead of asking for a monthly payment of a few dollars, let's say that the signals help a little but luck is needed
Crypto signals are insider information concerning the future appreciation of a certain type of cryptocurrency. As practice shows, the information works correctly and allows you to make a profit in about 80-90% of cases since they are provided by its experienced analysts with solid experience. However, I doubt too much that free signals for crypto trading can be trusted.