It is important to note that cryptocurrency is a highly speculative and volatile market, and the value of any particular cryptocurrency can fluctuate significantly over time. As a beginner, it is important to do your own research and carefully consider the features and risks of any cryptocurrency before making a decision.

In terms of decentralization, it is true that Bitcoin has struggled with centralization in the past, with a small number of miners and mining pools controlling a large portion of the network's computing power. However, there are ongoing efforts to address this issue and increase decentralization in the Bitcoin network.

On the other hand, many altcoins claim to be decentralized but may actually be more centralized than they appear. It is important to carefully evaluate the features and structure of any altcoin before making an investment decision. PoS (Proof of Stake) and PoW (Proof of Work) are two different mechanisms used by cryptocurrencies to achieve consensus and secure the network. PoW systems, such as the one used by Bitcoin, require miners to perform computational work to create new blocks and earn rewards. PoS systems, on the other hand, allow users to "stake" their coins to validate transactions and earn rewards. PoS systems may be more susceptible to centralization than PoW systems, but this will depend on the specific implementation of the system.