There are a couple of concerning issues with crypto:

1. to secure the networks, the participation of the public in supporting the network by running a node has becomes cost prohibitive: one the one hand, you would need to download the blockchain raw: 90 gigs of storage space and the download speed is rather slow, meaning, it takes days and days to sync.
2. To support transactions and minting, mining is needed. The difficulty level versus the reward (this includes the price of the coin in FIAT and the reward for mining) is a net loss unless you enter into mining with a huge amount of hashes per second, we are talking terra-hashes. Regular computers and laptops operate on the CPU level at around 2000 - 6000 hashes, depending on the number of cores, and the GPU at 2.5 mega/ hashes. Fly in the ointment is the price for energy.
3. More energy is needed to sustain these networks for achieving the goals.
4. compare: gold/silver is physical and belongs to our 3D world. Paper money has no intrinsic value, other than use case and is easily manipulated. Crypto has no intrinsic value, depends on: energy and internet access under state control, is easily manipulated via options and futures and does not belong to our 3D world. God made Gold and Silver. Man made paper and artificial derivatives. Who do you trust?

In sum, this means that the goal of these crypto coins: the decentralization/ democratization of these payments methods has been screwed.

Solutions:

The first solution

would be the increase of the crypto coins in relation to FIAT. For instance: if Bitcoin would grow to 300.000 with the current reward scheme, it would become economical to mine for the commoner. However, halving is incoming in around 45 days. SO, without the increase of difficulty, it would bring bitcoin to a needed 600.000 dollars per coin.

Monero yields with CPU mining around 3 or 4 cents a day (24 hours). Would that increase due to the price of Monero in relation to FIAT with a factor of 20, it would become feasible to mine, and thus support the network to remain decentralized and anonymous, with quick low costs transfers.

A second solution:

decrease in the price of energy. This can be achieved by "drill baby drill" but also the establishment of thorium reactors, and by preference, small devices, so decentralization becomes feasible. As a matter of fact: the emergence of atomic power (uranium) promised the delivery of ultra cheap energy. Unfortunately, the idiots went for the potential of making bombs instead of solving the energy to waste question in a logical and economical way. So, now, we have to have a 20.000 year storage, whereas 200 years was in 1953 perfectly feasible.

A third solution:

would be pooling, but there is a rub. The pool itself costs money, though not very big, oftentimes between 0,5% to 4%, depending on the coin. The growth in mining operations, means that the total hashpower increases, which means the difficulty of block solution increases, and thus functions as a prohibitive against deployment. This is an internal contradiction.