Bitcoin is continuously changing in its value and few days ago there was very large decrease happened but now it is again higher so as bitcoin is changing the price of altcoins also changes but don't always prefer trendy coins but choose some top ones that can make you wealthy.

Ethereum and Solana are very successful and you should not forget to invest in these coins and it is not much effected by market dip therefore invest in most successful coins instead of finding new and unknown coins.