For all my 5 months in trading, I'm learning only technical analysis but now everyone is talking about the concept of "Smart Money". So I think that trading is changing and speculators should stop trading based on technical analysis. Or smart money just a concept that cannot possibly work in the market,
It's not, "that trading is changing", quoting your choice of expression there. It's just that modern traders are beginning to develop new concepts to challenge the market, so to say. What constitutes SMC – Smart Money Concept – have all been there years ago without anyone knowing they could be used to trade the market. Concepts like OB – Order Block, Value Gaps, Breaker Blocks, Market Structure and the rest of Market Shift, CHoCH and BoS, were all there all along.
As for whether TA works or not, I think crypto trading is mostly controlled by news than technicals. That's not taking anything away from the perspective of technical analysts. The market still makes use of such.