Networks are becoming congested.
Well, let's see some facts:
Bitcoin Transaction RateWe can see that the transaction rate is still low compared to 2017: 2,1 to 2,3 transactions/second are coming through. There is a very slight increase with respect to April (the 1-year-low, about ~1,8-1,9) but it's still far below the values recorded in 2017, even in the early months of the year. Segwit allows 4-7 tx/s, so Bitcoin is far away from being "congested" at this moment.
So I guess you refer to Ethereum - but there a congestion and Gas price increase is only logical, due to the popularity of ETH as a platform for ICOs which are bloating the blockchain. (If
this chart is correct, it may be however a short-term spike.)
The prices of bitcoin, ethereum and some other altcoins are gradually increasing.
Well, they are at a very low level still, albeit it seems that a short-term bottom has been reached.
Does it now mean that bull run for this year is imminent?
My personal conclusion is no. I would like to believe that the $6000 area was the bottom for Bitcoin in this year, but there is still too much capital "sunk" in totally inflated tokens and clone-coins that will never succeed. There was already some market shakeout, but I guess the shakeout will continue some time more.
Bitcoin may not fall much with respect to the low of $6000 (I guess $5000 is a good mark, with a likely short-term drop down to $3000 at most) but most altcoins - and above all, "tokens" - will still continue to fall.